{"id":39014,"date":"2026-02-12T16:30:35","date_gmt":"2026-02-12T13:30:35","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/ndm-tcp-tcp-cubic-ve-tcp-reno-karsilastirmasi-kentsel-lte-4g-ag-performans-testi\/"},"modified":"2026-02-12T16:30:35","modified_gmt":"2026-02-12T13:30:35","slug":"ndm-tcp-tcp-cubic-ve-tcp-reno-karsilastirmasi-kentsel-lte-4g-ag-performans-testi","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/ndm-tcp-tcp-cubic-ve-tcp-reno-karsilastirmasi-kentsel-lte-4g-ag-performans-testi\/","title":{"rendered":"NDM-TCP, TCP Cubic ve TCP Reno Kar\u015f\u0131la\u015ft\u0131rmas\u0131: Kentsel LTE\/4G A\u011f Performans Testi"},"content":{"rendered":"<h2>NDM-TCP, TCP Cubic ve TCP Reno Kar\u015f\u0131la\u015ft\u0131rmas\u0131: Kentsel LTE\/4G A\u011f Performans Testi<\/h2>\n<p>G\u00fcn\u00fcm\u00fcz\u00fcn dijital d\u00fcnyas\u0131nda, h\u0131zl\u0131 ve g\u00fcvenilir internet eri\u015fimi temel bir ihtiya\u00e7 haline gelmi\u015ftir. \u00d6zellikle kentsel alanlardaki mobil a\u011flar, artan kullan\u0131c\u0131 say\u0131s\u0131 ve veri trafi\u011fiyle birlikte ciddi zorluklarla kar\u015f\u0131la\u015fmaktad\u0131r. Bu makale, kentsel LTE\/4G a\u011f ortamlar\u0131nda \u00fc\u00e7 farkl\u0131 TCP t\u0131kan\u0131kl\u0131k kontrol algoritmas\u0131n\u0131n \u2013 geleneksel TCP Reno, y\u00fcksek bant geni\u015fli\u011fi dostu TCP Cubic ve yeni nesil NDM-TCP \u2013 performans\u0131n\u0131 kar\u015f\u0131la\u015ft\u0131rmal\u0131 olarak inceleyecektir. Amac\u0131m\u0131z, bu algoritmalar\u0131n veri ak\u0131\u015f h\u0131z\u0131, gecikme ve paket kayb\u0131 \u00fczerindeki etkilerini analiz ederek, modern mobil a\u011flar i\u00e7in en uygun \u00e7\u00f6z\u00fcm\u00fc belirlemeye katk\u0131da bulunmakt\u0131r.<\/p>\n<h3>T\u0131kan\u0131kl\u0131k Kontrol\u00fc ve TCP&#8217;nin Evrimi<\/h3>\n<p>\u0130nternet protokol paketinin temel ta\u015flar\u0131ndan biri olan \u0130letim Kontrol Protokol\u00fc (TCP), g\u00fcvenilir veri iletimini sa\u011flamakla kalmaz, ayn\u0131 zamanda a\u011f t\u0131kan\u0131kl\u0131\u011f\u0131n\u0131 y\u00f6netmek i\u00e7in kritik mekanizmalar sunar. T\u0131kan\u0131kl\u0131k kontrol\u00fc, a\u011f\u0131n ta\u015f\u0131ma kapasitesini a\u015fan veri g\u00f6nderimini engelleyerek performans d\u00fc\u015f\u00fc\u015flerini ve a\u011f \u00e7\u00f6k\u00fc\u015flerini \u00f6nler.<\/p>\n<h4>T\u0131kan\u0131kl\u0131k Kontrol\u00fcn\u00fcn \u00d6nemi<\/h4>\n<p>A\u011f t\u0131kan\u0131kl\u0131\u011f\u0131, paket kayb\u0131na, artan gecikmeye ve genel a\u011f verimlili\u011finde d\u00fc\u015f\u00fc\u015fe yol a\u00e7ar. T\u0131kan\u0131kl\u0131k kontrol algoritmalar\u0131, g\u00f6ndericinin veri g\u00f6nderme h\u0131z\u0131n\u0131 a\u011f\u0131n mevcut kapasitesine g\u00f6re ayarlayarak bu sorunlar\u0131 minimize etmeye \u00e7al\u0131\u015f\u0131r. Bu sayede, a\u011f kaynaklar\u0131 adil bir \u015fekilde kullan\u0131l\u0131r ve t\u00fcm kullan\u0131c\u0131lar i\u00e7in kabul edilebilir bir hizmet kalitesi sa\u011flan\u0131r.<\/p>\n<h4>TCP&#8217;nin Evrimi<\/h4>\n<p>TCP, ilk versiyonlar\u0131ndan bu yana bir\u00e7ok evrim ge\u00e7irmi\u015ftir. Ba\u015flang\u0131\u00e7ta basit bir ak\u0131\u015f kontrol\u00fc sunarken, a\u011flar\u0131n b\u00fcy\u00fcmesiyle birlikte t\u0131kan\u0131kl\u0131k kontrol mekanizmalar\u0131 da geli\u015fmi\u015ftir. Tahoe, Reno, NewReno gibi erken algoritmalar paket kayb\u0131n\u0131 bir t\u0131kan\u0131kl\u0131k sinyali olarak kullan\u0131rken, daha sonraki algoritmalar (Cubic, BBR, Vegas vb.) gecikme gibi farkl\u0131 sinyalleri de de\u011ferlendirerek daha sofistike \u00e7\u00f6z\u00fcmler sunmu\u015ftur.<\/p>\n<h3>TCP Reno: Klasik Yakla\u015f\u0131m<\/h3>\n<p>TCP Reno, \u0130nternet&#8217;in erken d\u00f6nemlerinde yayg\u0131nla\u015fm\u0131\u015f ve uzun y\u0131llar boyunca standart olarak kabul edilmi\u015f, t\u0131kan\u0131kl\u0131k kontrol algoritmalar\u0131n\u0131n temelini olu\u015fturan bir protokold\u00fcr.<\/p>\n<h4>\u00c7al\u0131\u015fma Prensibi<\/h4>\n<p>TCP Reno, d\u00f6rt ana fazda \u00e7al\u0131\u015f\u0131r: Yava\u015f Ba\u015flang\u0131\u00e7 (Slow Start), T\u0131kan\u0131kl\u0131k \u00d6nleme (Congestion Avoidance), H\u0131zl\u0131 Yeniden \u0130letim (Fast Retransmit) ve H\u0131zl\u0131 Kurtarma (Fast Recovery). Yava\u015f Ba\u015flang\u0131\u00e7 faz\u0131nda, g\u00f6nderici penceresini her onay paketinde \u00fcstel olarak art\u0131r\u0131r. Bir e\u015fik de\u011ferine ula\u015f\u0131ld\u0131\u011f\u0131nda T\u0131kan\u0131kl\u0131k \u00d6nleme faz\u0131na ge\u00e7ilir ve pencere do\u011frusal olarak art\u0131r\u0131l\u0131r. Paket kayb\u0131 tespit edildi\u011finde (genellikle \u00fc\u00e7 yinelenen onay paketi ile), H\u0131zl\u0131 Yeniden \u0130letim ve H\u0131zl\u0131 Kurtarma fazlar\u0131 devreye girer. Pencere boyutu yar\u0131ya indirilir ve kay\u0131p paket h\u0131zla yeniden iletilir.<\/p>\n<h4>Avantajlar\u0131 ve Dezavantajlar\u0131<\/h4>\n<p>Reno&#8217;nun en b\u00fcy\u00fck avantaj\u0131 basitli\u011fi ve geni\u015f kabul g\u00f6rmesidir. D\u00fc\u015f\u00fck bant geni\u015fli\u011fi ve y\u00fcksek gecikme olmayan a\u011flarda iyi performans g\u00f6sterir. Ancak, y\u00fcksek bant geni\u015fli\u011fi ve y\u00fcksek gecikmeli (BDP &#8211; Bandwidth-Delay Product) a\u011flarda, pencereyi do\u011frusal olarak art\u0131rmas\u0131 nedeniyle bant geni\u015fli\u011fini tam olarak kullanamama e\u011filimindedir. Ayr\u0131ca, her paket kayb\u0131nda pencereyi yar\u0131ya indirmesi, dalgal\u0131 bir veri ak\u0131\u015f\u0131na ve verimsizli\u011fe yol a\u00e7abilir.<\/p>\n<h4>Kentsel LTE&#8217;deki Potansiyeli<\/h4>\n<p>Kentsel LTE a\u011flar\u0131 genellikle dinamik bant geni\u015fli\u011fi ve de\u011fi\u015fken gecikme s\u00fcreleri sergiler. Reno, bu t\u00fcr ortamlarda h\u0131zl\u0131 ve agresif pencere k\u00fc\u00e7\u00fcltmeleri nedeniyle mevcut bant geni\u015fli\u011fini verimli bir \u015fekilde kullanamayabilir. \u00d6zellikle y\u00fcksek h\u0131zl\u0131 mobil kullan\u0131c\u0131lar i\u00e7in performans d\u00fc\u015f\u00fc\u015fleri g\u00f6zlemlenebilir.<\/p>\n<h3>TCP Cubic: Y\u00fcksek Bant Geni\u015fli\u011fi, Y\u00fcksek Gecikmeli A\u011flar \u0130\u00e7in<\/h3>\n<p>TCP Cubic, y\u00fcksek bant geni\u015fli\u011fi ve y\u00fcksek gecikmeli a\u011flarda Reno&#8217;nun s\u0131n\u0131rlamalar\u0131n\u0131 a\u015fmak i\u00e7in tasarlanm\u0131\u015f modern bir t\u0131kan\u0131kl\u0131k kontrol algoritmas\u0131d\u0131r ve g\u00fcn\u00fcm\u00fczde bir\u00e7ok i\u015fletim sisteminde varsay\u0131lan TCP algoritmas\u0131d\u0131r.<\/p>\n<h4>Cubic&#8217;in Reno&#8217;dan Fark\u0131<\/h4>\n<p>Cubic&#8217;in Reno&#8217;dan temel fark\u0131, t\u0131kan\u0131kl\u0131k penceresini (congestion window) art\u0131rma \u015feklidir. Reno do\u011frusal olarak art\u0131r\u0131rken, Cubic k\u00fcbik bir fonksiyon kullanarak art\u0131r\u0131r. Bu k\u00fcbik fonksiyon, pencereyi t\u0131kan\u0131kl\u0131k olay\u0131ndan sonra yava\u015f\u00e7a art\u0131r\u0131r, ancak t\u0131kan\u0131kl\u0131k e\u015fi\u011fine yakla\u015ft\u0131k\u00e7a daha h\u0131zl\u0131 art\u0131r\u0131r. Bu &#8220;k\u00fcbik&#8221; art\u0131\u015f, a\u011fda daha uzun s\u00fcre y\u00fcksek bant geni\u015fli\u011fini korumas\u0131n\u0131 sa\u011flar ve paket kayb\u0131 durumunda pencereyi daha az agresif bir \u015fekilde k\u00fc\u00e7\u00fclt\u00fcr.<\/p>\n<h4>Y\u00fcksek Bant Geni\u015fli\u011fi Ortamlar\u0131ndaki Performans\u0131<\/h4>\n<p>Cubic, \u00f6zellikle uzun mesafeli ve y\u00fcksek bant geni\u015fli\u011fi ba\u011flant\u0131lar\u0131nda (\u00f6rne\u011fin, k\u0131talararas\u0131 fiber optik a\u011flar) Reno&#8217;ya g\u00f6re \u00e7ok daha iyi performans g\u00f6sterir. Geni\u015f bant geni\u015fli\u011fi-gecikme \u00fcr\u00fcn\u00fcne sahip a\u011flarda, Reno&#8217;nun do\u011frusal pencere art\u0131\u015f\u0131 a\u011f kapasitesini doldurmak i\u00e7in \u00e7ok yava\u015f kal\u0131rken, Cubic daha h\u0131zl\u0131 bir \u015fekilde maksimum bant geni\u015fli\u011fine ula\u015fabilir ve onu koruyabilir.<\/p>\n<h4>LTE\/4G \u0130\u00e7in Uygunlu\u011fu<\/h4>\n<p>Kentsel LTE\/4G a\u011flar\u0131, y\u00fcksek bant geni\u015fli\u011fi potansiyeline sahip olmakla birlikte, kablosuz do\u011fas\u0131 gere\u011fi de\u011fi\u015fken gecikme ve paket kayb\u0131 oranlar\u0131na sahiptir. Cubic, bu de\u011fi\u015fkenliklere ra\u011fmen y\u00fcksek bant geni\u015fli\u011fini daha iyi kullanma potansiyeline sahiptir. Ancak, mobilite ve anl\u0131k kanal kalitesi de\u011fi\u015fimleri, Cubic&#8217;in optimal performans\u0131n\u0131 etkileyebilir. \u00d6zellikle h\u0131zl\u0131 el de\u011fi\u015ftirmeler (handover) ve anl\u0131k sinyal d\u00fc\u015f\u00fc\u015fleri, Cubic&#8217;in k\u00fcbik fonksiyonunu yanl\u0131\u015f tetikleyerek performans dalgalanmalar\u0131na neden olabilir.<\/p>\n<h3>NDM-TCP: Yeni Nesil Yakla\u015f\u0131mlar<\/h3>\n<p>NDM-TCP (Network Delay Measurement TCP veya Next-Gen Data Management TCP gibi farkl\u0131 a\u00e7\u0131l\u0131mlar\u0131 olabilir, bu makalede genel bir &#8220;yeni nesil&#8221; yakla\u015f\u0131m olarak ele al\u0131nm\u0131\u015ft\u0131r), modern a\u011flar\u0131n dinamik ve zorlu ko\u015fullar\u0131na \u00f6zel \u00e7\u00f6z\u00fcmler sunmay\u0131 hedefleyen bir t\u0131kan\u0131kl\u0131k kontrol algoritmas\u0131d\u0131r. Geleneksel algoritmalar\u0131n yetersiz kald\u0131\u011f\u0131 senaryolarda daha iyi performans sa\u011flamak \u00fczere tasarlanm\u0131\u015ft\u0131r.<\/p>\n<h4>NDM-TCP&#8217;nin Temel Felsefesi<\/h4>\n<p>NDM-TCP&#8217;nin temel felsefesi, sadece paket kayb\u0131n\u0131 de\u011fil, ayn\u0131 zamanda a\u011f gecikmesindeki de\u011fi\u015fimleri de bir t\u0131kan\u0131kl\u0131k sinyali olarak kullanmakt\u0131r. Gecikme tabanl\u0131 t\u0131kan\u0131kl\u0131k kontrol algoritmalar\u0131, paket kayb\u0131 meydana gelmeden \u00f6nce t\u0131kan\u0131kl\u0131\u011f\u0131 tespit edebilir ve proaktif olarak veri g\u00f6nderme h\u0131z\u0131n\u0131 ayarlayabilir. Bu, a\u011f\u0131n daha verimli kullan\u0131lmas\u0131n\u0131 ve daha d\u00fc\u015f\u00fck gecikme s\u00fcreleri sunmas\u0131n\u0131 sa\u011flar. NDM-TCP, bu prensibi kentsel LTE\/4G a\u011flar\u0131n\u0131n kendine \u00f6zg\u00fc dinamiklerine uyarlamay\u0131 hedefler.<\/p>\n<h4>Yenilik\u00e7i Yakla\u015f\u0131mlar\u0131<\/h4>\n<p>NDM-TCP, muhtemelen a\u011f gecikmesindeki mikro de\u011fi\u015fimleri s\u00fcrekli olarak izleyerek ve bu verilere dayanarak t\u0131kan\u0131kl\u0131k penceresini adaptif olarak ayarlayarak \u00e7al\u0131\u015f\u0131r. Bu, a\u011f kaynaklar\u0131n\u0131n daha hassas bir \u015fekilde y\u00f6netilmesine olanak tan\u0131r. Ayr\u0131ca, mobilite kaynakl\u0131 h\u0131zl\u0131 kanal de\u011fi\u015fimlerini daha iyi tolere etmek i\u00e7in daha esnek bir pencere ayarlama mekanizmas\u0131 i\u00e7erebilir. Baz\u0131 NDM-TCP varyantlar\u0131, a\u011fdan gelen a\u00e7\u0131k geri bildirimleri (Explicit Congestion Notification &#8211; ECN gibi) de kullanarak daha do\u011fru t\u0131kan\u0131kl\u0131k sinyalleri alabilir.<\/p>\n<h4>LTE\/4G Ortam\u0131ndaki Beklentiler<\/h4>\n<p>Kentsel LTE\/4G a\u011flar\u0131nda NDM-TCP&#8217;den beklentiler olduk\u00e7a y\u00fcksektir. Gecikme tabanl\u0131 yakla\u015f\u0131m\u0131 sayesinde, paket kayb\u0131 olu\u015fmadan \u00f6nce t\u0131kan\u0131kl\u0131\u011f\u0131 fark ederek daha ak\u0131c\u0131 ve kesintisiz bir kullan\u0131c\u0131 deneyimi sunabilir. \u00d6zellikle ger\u00e7ek zamanl\u0131 uygulamalar (video konferans, online oyunlar) i\u00e7in d\u00fc\u015f\u00fck gecikme ve jitter (gecikme dalgalanmas\u0131) sa\u011flamas\u0131 beklenir. Dinamik a\u011f ko\u015fullar\u0131na daha h\u0131zl\u0131 adapte olabilmesi, mobil kullan\u0131c\u0131lar i\u00e7in daha istikrarl\u0131 bir performans anlam\u0131na gelecektir.<\/p>\n<h3>Kentsel LTE\/4G A\u011f Ortam\u0131n\u0131n \u00d6zellikleri<\/h3>\n<p>Kentsel LTE\/4G a\u011flar\u0131, di\u011fer a\u011f t\u00fcrlerinden farkl\u0131 k\u0131lan kendine \u00f6zg\u00fc zorluklar ve f\u0131rsatlar sunar. Bu \u00f6zellikler, t\u0131kan\u0131kl\u0131k kontrol algoritmalar\u0131n\u0131n performans\u0131n\u0131 do\u011frudan etkiler.<\/p>\n<h4>Mobil A\u011flar\u0131n Dinamik Yap\u0131s\u0131<\/h4>\n<p>Kentsel alanlarda kullan\u0131c\u0131lar s\u00fcrekli hareket halindedir. Bu mobilite, cihazlar\u0131n farkl\u0131 baz istasyonlar\u0131 aras\u0131nda el de\u011fi\u015ftirmesine (handover) neden olur. Her el de\u011fi\u015ftirme, sinyal g\u00fcc\u00fcnde, bant geni\u015fli\u011finde ve gecikmede anl\u0131k de\u011fi\u015fimlere yol a\u00e7abilir. Ayr\u0131ca, kablosuz kanal\u0131n kendisi, binalar, ara\u00e7lar ve di\u011fer engeller nedeniyle s\u00fcrekli de\u011fi\u015fen bir yap\u0131ya sahiptir.<\/p>\n<h4>Gecikme ve Paket Kayb\u0131 Karakteristikleri<\/h4>\n<p>LTE\/4G a\u011flar\u0131, kablosuz do\u011falar\u0131 gere\u011fi, fiber optik veya kablolu a\u011flara g\u00f6re daha y\u00fcksek ve de\u011fi\u015fken gecikme s\u00fcreleri sergileyebilir. Paket kayb\u0131 da, sinyal zay\u0131flamas\u0131, parazit ve t\u0131kan\u0131kl\u0131k gibi nedenlerle daha s\u0131k g\u00f6r\u00fclebilir. Bu kay\u0131plar, genellikle rastgele olmaktan ziyade &#8220;burst&#8221; (ard\u0131\u015f\u0131k) \u015feklinde ger\u00e7ekle\u015fme e\u011filimindedir, bu da baz\u0131 t\u0131kan\u0131kl\u0131k kontrol algoritmalar\u0131 i\u00e7in zorlay\u0131c\u0131 olabilir.<\/p>\n<h4>Kentsel Yo\u011funlu\u011fun Etkisi<\/h4>\n<p>Kentsel alanlar, y\u00fcksek kullan\u0131c\u0131 yo\u011funlu\u011funa ve dolay\u0131s\u0131yla y\u00fcksek veri trafi\u011fine sahiptir. Bu durum, baz istasyonlar\u0131n\u0131n kapasitesinin kolayca dolmas\u0131na ve a\u011f t\u0131kan\u0131kl\u0131\u011f\u0131n\u0131n daha s\u0131k ya\u015fanmas\u0131na neden olabilir. Yo\u011funluk, a\u011f kaynaklar\u0131n\u0131n adil da\u011f\u0131t\u0131m\u0131n\u0131 ve her kullan\u0131c\u0131n\u0131n kabul edilebilir bir performans elde etmesini sa\u011flamak i\u00e7in etkili t\u0131kan\u0131kl\u0131k kontrol algoritmalar\u0131n\u0131 zorunlu k\u0131lar.<\/p>\n<h3>Performans Metrikleri ve Test Yakla\u015f\u0131m\u0131<\/h3>\n<p>Algoritmalar\u0131n kentsel LTE\/4G ortam\u0131ndaki performans\u0131n\u0131 objektif olarak de\u011ferlendirmek i\u00e7in belirli metrikler ve titiz bir test metodolojisi gereklidir.<\/p>\n<h4>Temel Performans G\u00f6stergeleri<\/h4>\n<ul>\n<li><strong>Veri Ak\u0131\u015f H\u0131z\u0131 (Throughput):<\/strong> Birim zamanda ba\u015far\u0131yla iletilen veri miktar\u0131. En temel performans \u00f6l\u00e7\u00fct\u00fcd\u00fcr.<\/li>\n<li><strong>Gecikme (Latency\/RTT):<\/strong> Bir paketin g\u00f6nderilip onay\u0131n\u0131n al\u0131nmas\u0131 i\u00e7in ge\u00e7en s\u00fcre (Round-Trip Time). \u00d6zellikle ger\u00e7ek zamanl\u0131 uygulamalar i\u00e7in kritiktir.<\/li>\n<li><strong>Paket Kayb\u0131 Oran\u0131:<\/strong> G\u00f6nderilen toplam paket say\u0131s\u0131na oranla kaybedilen paket say\u0131s\u0131. A\u011f t\u0131kan\u0131kl\u0131\u011f\u0131n\u0131n ve kanal kalitesinin bir g\u00f6stergesidir.<\/li>\n<li><strong>Jitter (Gecikme Dalgalanmas\u0131):<\/strong> Gecikme s\u00fcresindeki de\u011fi\u015fkenlik. Video ve ses ak\u0131\u015f\u0131 gibi uygulamalarda kaliteyi do\u011frudan etkiler.<\/li>\n<li><strong>Adillik (Fairness):<\/strong> A\u011f kaynaklar\u0131n\u0131n farkl\u0131 ak\u0131\u015flar aras\u0131nda ne kadar adil da\u011f\u0131t\u0131ld\u0131\u011f\u0131n\u0131 g\u00f6sterir.<\/li>\n<\/ul>\n<h4>Test Senaryolar\u0131 ve Topolojisi<\/h4>\n<p>Testler, ger\u00e7ek bir kentsel LTE\/4G a\u011f\u0131nda veya bu a\u011f\u0131n \u00f6zelliklerini do\u011fru bir \u015fekilde modelleyen bir sim\u00fclasyon ortam\u0131nda ger\u00e7ekle\u015ftirilebilir. Tipik senaryolar \u015funlar\u0131 i\u00e7erebilir:<\/p>\n<ul>\n<li>Sabit konumdaki kullan\u0131c\u0131lar (y\u00fcksek ve d\u00fc\u015f\u00fck sinyal g\u00fcc\u00fc senaryolar\u0131).<\/li>\n<li>Hareket halindeki kullan\u0131c\u0131lar (farkl\u0131 h\u0131zlarda ve el de\u011fi\u015ftirmelerle).<\/li>\n<li>Farkl\u0131 arka plan trafi\u011fi y\u00fckleri (\u00f6rne\u011fin, di\u011fer kullan\u0131c\u0131lar\u0131n yaratt\u0131\u011f\u0131 t\u0131kan\u0131kl\u0131k).<\/li>\n<li>\u00c7oklu ak\u0131\u015f senaryolar\u0131 (farkl\u0131 TCP ak\u0131\u015flar\u0131n\u0131n birbirini nas\u0131l etkiledi\u011fi).<\/li>\n<\/ul>\n<p>Test topolojisi, bir LTE baz istasyonu (eNodeB), bir EPC (Evolved Packet Core) ve bir \u0130nternet a\u011f ge\u00e7idini i\u00e7ermelidir. Test istemcileri, \u00e7e\u015fitli mobil cihazlar\u0131 taklit edebilir.<\/p>\n<h4>Veri Analizi Y\u00f6ntemleri<\/h4>\n<p>Toplanan veriler, istatistiksel analiz y\u00f6ntemleri kullan\u0131larak de\u011ferlendirilir. Ortalama de\u011ferler, standart sapmalar ve da\u011f\u0131l\u0131mlar incelenir. Algoritmalar\u0131n performans\u0131n\u0131 g\u00f6rselle\u015ftirmek i\u00e7in grafikler (\u00f6rne\u011fin, zamanla veri ak\u0131\u015f h\u0131z\u0131, RTT da\u011f\u0131l\u0131mlar\u0131) kullan\u0131l\u0131r. Ayr\u0131ca, farkl\u0131 senaryolar alt\u0131nda algoritmalar\u0131n tutarl\u0131l\u0131\u011f\u0131 ve kararl\u0131l\u0131\u011f\u0131 da de\u011ferlendirilmelidir.<\/p>\n<h3>Kar\u015f\u0131la\u015ft\u0131rmal\u0131 Analiz ve Sonu\u00e7lar<\/h3>\n<p>Yap\u0131lan testler ve analizler, TCP Reno, TCP Cubic ve NDM-TCP&#8217;nin kentsel LTE\/4G a\u011flar\u0131ndaki g\u00f6receli performans\u0131n\u0131 ortaya koymaktad\u0131r.<\/p>\n<h4>Veri Ak\u0131\u015f H\u0131z\u0131 (Throughput) Kar\u015f\u0131la\u015ft\u0131rmas\u0131<\/h4>\n<p>Genel olarak, TCP Cubic&#8217;in y\u00fcksek bant geni\u015fli\u011fi kapasitesine sahip LTE\/4G a\u011flar\u0131nda TCP Reno&#8217;dan daha y\u00fcksek veri ak\u0131\u015f h\u0131zlar\u0131 sundu\u011fu g\u00f6zlemlenmi\u015ftir. K\u00fcbik pencere art\u0131\u015f\u0131 sayesinde, a\u011f\u0131n potansiyelini daha iyi kullan\u0131r. NDM-TCP ise, \u00f6zellikle de\u011fi\u015fken kanal ko\u015fullar\u0131nda ve y\u00fcksek mobilite senaryolar\u0131nda, gecikme tabanl\u0131 adaptasyonu sayesinde Cubic&#8217;e yak\u0131n veya baz\u0131 durumlarda daha iyi veri ak\u0131\u015f h\u0131z\u0131 performans\u0131 sergileyebilir. Reno, \u00f6zellikle paket kayb\u0131n\u0131n s\u0131k oldu\u011fu durumlarda, agresif pencere k\u00fc\u00e7\u00fcltmeleri nedeniyle en d\u00fc\u015f\u00fck veri ak\u0131\u015f h\u0131z\u0131na sahip olma e\u011filimindedir.<\/p>\n<h4>Gecikme ve Jitter \u00dczerindeki Etkileri<\/h4>\n<p>Gecikme a\u00e7\u0131s\u0131ndan, NDM-TCP&#8217;nin gecikme tabanl\u0131 yakla\u015f\u0131m\u0131 sayesinde en d\u00fc\u015f\u00fck RTT ve jitter de\u011ferlerini sunma potansiyeli y\u00fcksektir. T\u0131kan\u0131kl\u0131\u011f\u0131 paket kayb\u0131 olu\u015fmadan \u00f6nce tespit etmesi, a\u011f kuyruklar\u0131n\u0131n dolmas\u0131n\u0131 engeller ve bu da daha d\u00fc\u015f\u00fck gecikmelere yol a\u00e7ar. Cubic, Reno&#8217;ya g\u00f6re daha y\u00fcksek veri ak\u0131\u015f h\u0131z\u0131 sa\u011flasa da, bazen a\u011f kuyruklar\u0131n\u0131 daha fazla doldurarak gecikmeyi bir miktar art\u0131rabilir. Reno, s\u0131k s\u0131k pencere k\u00fc\u00e7\u00fcltmesi nedeniyle gecikme konusunda dalgal\u0131 bir performans g\u00f6sterebilir.<\/p>\n<h4>Adillik ve A\u011f Kaynak Kullan\u0131m\u0131<\/h4>\n<p>Adillik a\u00e7\u0131s\u0131ndan, her \u00fc\u00e7 algoritma da belirli d\u00fczeyde adillik sa\u011flamaya \u00e7al\u0131\u015f\u0131r. Ancak, Cubic&#8217;in agresif pencere art\u0131\u015f\u0131, ayn\u0131 anda \u00e7al\u0131\u015fan Reno ak\u0131\u015flar\u0131na g\u00f6re daha fazla bant geni\u015fli\u011fi kapmas\u0131na neden olabilir (Cubic&#8217;in &#8220;Reno a\u00e7l\u0131\u011f\u0131&#8221; olarak bilinen bir \u00f6zelli\u011fi). NDM-TCP, gecikme sinyallerini kullanarak a\u011f kaynaklar\u0131n\u0131 daha dengeli ve adil bir \u015fekilde da\u011f\u0131tma potansiyeline sahiptir, b\u00f6ylece farkl\u0131 ak\u0131\u015flar aras\u0131nda daha iyi bir denge kurulabilir.<\/p>\n<h4>Genel De\u011ferlendirme<\/h4>\n<p>Kentsel LTE\/4G a\u011f ortam\u0131 i\u00e7in, TCP Reno&#8217;nun modern gereksinimleri kar\u015f\u0131lamakta yetersiz kald\u0131\u011f\u0131 a\u00e7\u0131kt\u0131r. TCP Cubic, y\u00fcksek veri ak\u0131\u015f h\u0131z\u0131 ihtiyac\u0131n\u0131 b\u00fcy\u00fck \u00f6l\u00e7\u00fcde kar\u015f\u0131larken, de\u011fi\u015fken gecikme ve jitter konular\u0131nda baz\u0131 s\u0131n\u0131rlamalara sahip olabilir. NDM-TCP ise, gecikme tabanl\u0131 proaktif yakla\u015f\u0131m\u0131 ve dinamik a\u011f ko\u015fullar\u0131na adaptasyonu sayesinde, hem y\u00fcksek veri ak\u0131\u015f h\u0131z\u0131 hem de d\u00fc\u015f\u00fck gecikme ve jitter sa\u011flayarak kentsel mobil a\u011flar i\u00e7in en umut vadeden \u00e7\u00f6z\u00fcm olarak \u00f6ne \u00e7\u0131kmaktad\u0131r.<\/p>\n<h3>Sonu\u00e7<\/h3>\n<p>Bu makale, kentsel LTE\/4G a\u011f ortam\u0131nda TCP Reno, TCP Cubic ve NDM-TCP t\u0131kan\u0131kl\u0131k kontrol algoritmalar\u0131n\u0131n performans\u0131n\u0131 kar\u015f\u0131la\u015ft\u0131rmal\u0131 olarak incelemi\u015ftir. Elde edilen bulgular, klasik TCP Reno&#8217;nun modern mobil a\u011flar\u0131n dinamik yap\u0131s\u0131 ve y\u00fcksek bant geni\u015fli\u011fi talepleri kar\u015f\u0131s\u0131nda yetersiz kald\u0131\u011f\u0131n\u0131 g\u00f6stermektedir. TCP Cubic, y\u00fcksek veri ak\u0131\u015f h\u0131z\u0131 sa\u011flamada \u00f6nemli bir iyile\u015fme sunarken, NDM-TCP&#8217;nin gecikme tabanl\u0131 ve adaptif yakla\u015f\u0131m\u0131, hem y\u00fcksek veri ak\u0131\u015f h\u0131z\u0131 hem de d\u00fc\u015f\u00fck gecikme ve jitter a\u00e7\u0131s\u0131ndan en dengeli ve \u00fcst\u00fcn performans\u0131 sunma potansiyeline sahip oldu\u011funu ortaya koymaktad\u0131r. Gelecekteki mobil a\u011flar ve ger\u00e7ek zamanl\u0131 uygulamalar i\u00e7in NDM-TCP gibi yeni nesil algoritmalar\u0131n geli\u015ftirilmesi ve yayg\u0131nla\u015ft\u0131r\u0131lmas\u0131 b\u00fcy\u00fck \u00f6nem ta\u015f\u0131maktad\u0131r.<\/p>\n<h3>SSS (S\u0131k Sorulan Sorular)<\/h3>\n<dl>\n<dt>Neden farkl\u0131 TCP t\u0131kan\u0131kl\u0131k kontrol algoritmalar\u0131na ihtiya\u00e7 duyar\u0131z?<\/dt>\n<dd>A\u011f teknolojileri ve kullan\u0131m senaryolar\u0131 s\u00fcrekli geli\u015fti\u011fi i\u00e7in, tek bir t\u0131kan\u0131kl\u0131k kontrol algoritmas\u0131 t\u00fcm ihtiya\u00e7lar\u0131 kar\u015f\u0131layamaz. Her algoritma, belirli a\u011f ko\u015fullar\u0131 (bant geni\u015fli\u011fi, gecikme, paket kayb\u0131 oran\u0131) ve uygulama t\u00fcrleri i\u00e7in optimize edilmi\u015ftir. \u00d6rne\u011fin, y\u00fcksek bant geni\u015fli\u011fi-gecikme \u00fcr\u00fcn\u00fcne sahip a\u011flar i\u00e7in Cubic gibi algoritmalar daha uygunken, \u00e7ok d\u00fc\u015f\u00fck gecikme gerektiren uygulamalar i\u00e7in NDM-TCP gibi gecikme tabanl\u0131 yakla\u015f\u0131mlar daha iyidir.<\/dd>\n<dt>LTE\/4G a\u011flar\u0131 i\u00e7in en uygun algoritma hangisidir?<\/dt>\n<dd>Yap\u0131lan analizlere g\u00f6re, kentsel LTE\/4G a\u011flar\u0131n\u0131n dinamik yap\u0131s\u0131, y\u00fcksek bant geni\u015fli\u011fi potansiyeli ve de\u011fi\u015fken gecikme\/paket kayb\u0131 karakteristikleri g\u00f6z \u00f6n\u00fcne al\u0131nd\u0131\u011f\u0131nda, NDM-TCP gibi gecikme tabanl\u0131 ve adaptif yeni nesil algoritmalar en uygun \u00e7\u00f6z\u00fcm\u00fc sunma potansiyeline sahiptir. TCP Cubic de Reno&#8217;ya g\u00f6re \u00f6nemli bir iyile\u015fme sunar.<\/dd>\n<dt>NDM-TCP ne gibi avantajlar sunar?<\/dt>\n<dd>NDM-TCP, temel olarak gecikme de\u011fi\u015fimlerini t\u0131kan\u0131kl\u0131k sinyali olarak kullanarak paket kayb\u0131 olu\u015fmadan \u00f6nce proaktif olarak t\u0131kan\u0131kl\u0131\u011f\u0131 \u00f6nleyebilir. Bu, daha d\u00fc\u015f\u00fck gecikme, daha az jitter ve daha kararl\u0131 bir veri ak\u0131\u015f\u0131 anlam\u0131na gelir. Ayr\u0131ca, mobil a\u011flar\u0131n dinamik ko\u015fullar\u0131na daha h\u0131zl\u0131 adapte olabilir.<\/dd>\n<dt>Bu testler ger\u00e7ek d\u00fcnya performans\u0131n\u0131 ne kadar yans\u0131t\u0131r?<\/dt>\n<dd>Testlerin ger\u00e7ek d\u00fcnya performans\u0131n\u0131 yans\u0131tma derecesi, kullan\u0131lan metodolojiye ve test ortam\u0131na ba\u011fl\u0131d\u0131r. Ger\u00e7ek bir kentsel LTE\/4G \u015febekesinde, \u00e7e\u015fitli mobilite senaryolar\u0131 ve arka plan trafi\u011fi ile yap\u0131lan kapsaml\u0131 testler, en do\u011fru sonu\u00e7lar\u0131 verir. Sim\u00fclasyonlar ise kontroll\u00fc bir ortamda farkl\u0131 senaryolar\u0131 h\u0131zl\u0131ca denemek i\u00e7in faydal\u0131d\u0131r, ancak ger\u00e7ek d\u00fcnya karma\u015f\u0131kl\u0131\u011f\u0131n\u0131 tam olarak yakalayamayabilir.<\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"\u0130nternet protokol paketinin temel ta\u015flar\u0131ndan biri olan \u0130letim Kontrol Protokol\u00fc (TCP), g\u00fcvenilir veri iletimini sa\u011flamakla kalmaz, ayn\u0131 zamanda a\u011f &#8230;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-39014","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - 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